AR15 Mag/Round Question

(Posted on 11/20/12 at 4:09 pm)

I have both Colt/metal style mags and PMAGs. Couple of questions: If I wanted to have a couple mags loaded ready to go for the zombie apocalypse (a) Which one should I keep loaded? The metal mag or the PMAG? (b) What's a "safe" number of rounds to keep for a while on the spring without wearing it out for a 20 round mag and a 30 round mag?

I keep 2 9mm mags fully loaded just in case I need to use them quickly. Have had them sit there fully compressed for about 3 months. Haven't noticed any difference in springyness the other day when I unloaded the rounds